81 lines
2.3 KiB
Go
81 lines
2.3 KiB
Go
// Copyright 2022 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package core
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import (
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"context"
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"strings"
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"testing"
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"github.com/pingcap/tidb/parser"
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"github.com/pingcap/tidb/parser/format"
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"github.com/stretchr/testify/require"
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)
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func TestParameterize(t *testing.T) {
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sctx := MockContext()
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cases := []struct {
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sql string
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paramSQL string
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params []interface{}
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restoreSQL string
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}{
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{
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"select * from t where a<10",
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"SELECT * FROM `t` WHERE `a`<?",
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[]interface{}{int64(10)},
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"SELECT * FROM `t` WHERE `a`<10",
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},
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{
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"select * from t",
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"SELECT * FROM `t`",
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[]interface{}{},
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"SELECT * FROM `t`",
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},
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{
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"select * from t where a<10 and b<20 and c=30 and d>40",
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"SELECT * FROM `t` WHERE `a`<? AND `b`<? AND `c`=? AND `d`>?",
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[]interface{}{int64(10), int64(20), int64(30), int64(40)},
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"SELECT * FROM `t` WHERE `a`<10 AND `b`<20 AND `c`=30 AND `d`>40",
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},
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{
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"select * from t where a='a' and b='bbbbbbbbbbbbbbbbbbbbbbbb'",
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"SELECT * FROM `t` WHERE `a`=? AND `b`=?",
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[]interface{}{"a", "bbbbbbbbbbbbbbbbbbbbbbbb"},
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"SELECT * FROM `t` WHERE `a`=_UTF8MB4'a' AND `b`=_UTF8MB4'bbbbbbbbbbbbbbbbbbbbbbbb'",
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},
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// TODO: more test cases
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}
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for _, c := range cases {
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stmt, err := parser.New().ParseOneStmt(c.sql, "", "")
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require.Nil(t, err)
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paramSQL, params, err := ParameterizeAST(context.Background(), sctx, stmt)
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require.Nil(t, err)
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require.Equal(t, c.paramSQL, paramSQL)
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require.Equal(t, len(c.params), len(params))
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for i := range params {
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require.Equal(t, c.params[i], params[i].Datum.GetValue())
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}
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err = RestoreASTWithParams(context.Background(), sctx, stmt, params)
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require.Nil(t, err)
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var buf strings.Builder
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rCtx := format.NewRestoreCtx(format.DefaultRestoreFlags, &buf)
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require.Nil(t, stmt.Restore(rCtx))
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require.Equal(t, c.restoreSQL, buf.String())
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}
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}
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